PN8368

Chipown

www.chipown.com.cn

© 2017 Wuxi Chipown Microelectronics Limited

Rev.1710

Oct.-2017

1 / 12

Low Standby-Power Quasi-Resonant Primary-Side Converter

General Description

The PN8368 consists of a Low Standby-Power Quasi-Resonant (QR) Primary-Side controller and a avalanche-rugged smart

power VDMOSFET, specifically designed for a high performance AC/DC charger or adaptor with minimal external components.

PN8368 operates in primary-side sensing and regulation, so opto-coupler and TL431 could be eliminated. Because of internal HV

Start-up circuit, the system with PN8368 can achieve less than 30mW standby power consumption (230VAC). In CV mode,

multi-mode and quasi resonant technique is utilized to achieve high efficiency, avoid audible noise and make the system meeting

Energy star class VI. Good load regulation is achieved by the built-in cable drop compensation. In CC mode, the current and

output power setting can be adjusted externally by the sense resistor Rcs at CS pin. PN8368 offers complete protections including

Cycle-by-Cycle current limiting protection (OCP), over voltage protection (OVP), over temperature protection (OTP) and CS

open or short protection (CSO/SP) etc.

Applications

■ Switch AC/DC Adaptor

■ Battery Charger

Features

■

Internal avalanche-rugged smart power VDMOSFET

■

Internal HV Start-up Circuit, Standby power consumption <

30mW at 230VAC

■

Multi-mode and Quasi-Resonant technique achieve high

efficiency, meeting energy star class VI

■

±5% CC Regulation at Universal AC input

■

Primary-side Sensing and Regulation without TL431 and

Opto-coupler

■

Programmable Cable Drop Compensation

■

No-need Control Loop Compensation Capacitance

■

Excellent Protection Coverage:

Over Temperature Protection (OTP)

VDD Under/Over Voltage Protection(UVLO&OVP)

Cycle-by-Cycle Current Limiting (OCP)

Cs Short/Open Protection (CS O/SP)

Output Features

Package/Order Information

Typical power

Order codes

Package

85~265 VAC

PN8368SSC-R1D

SOP-7

8W

Typical Circuit

Snubber

AC

85~265V

DC

Output

FB

GND

Cable

comp

CC/CV

control

OTP

Block

HV

Startup

PWM Switch

&Gate Driver

SUPPLY

&UVLO

VDD

SW

PN8368

OCP

CS